Coal-drilling machine.



PATENTED MAR. 10, 1903. J. W. SHALLENBERGER.

GOAL DRILLING MACHINE.

APPLICATION FILED FEB. 23, 1901.

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UNITED STATES PATENT OFFICE.

JOHN W. SHALLENBERGER, OF CANAL FULTON, OHIO, ASSIGNOR TO WARWOOD TOOL COMPANY, OF WHEELING, WEST VIRGINIA.

COAL-DRILLING MACHINE.

$PECIFICATION forming part of Letters Patent No. 722,412, dated March 10, 1903. Application filed February 23,1901. Serial No. 48,451. (No model.)

To all whom it may concern:

Be it known that 1, JOHN W. SHALLENBEa GER, of Canal Fulton, in the county of Stark and State of Ohio, have invented a new and useful Coal-Drilling Machine, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation showing my improved machine in position in the tunnel. Fig. 2 is a sectional front elevation of the same. Fig. 3 is an enlarged detail view showing the mechanism for raising and clamping the adjusting-bar; and Figs. 4, 5, and 6 are detail views of the carrying-box and connections for the drill-shaft.

My invention relates to the machines used for drilling coal in the mines, and is designed to simplify, cheapen, and improve the means for securing these machines in place, for adjusting the position of the drill-shaft, and for supporting and operating this shaft.

In the drawings, 2 represents the post or general frame of the machine, having sepa rated vertical side members united at their bottom to form the sharp prong 3, which enters the-floor of the tunnel. These side pieces are secured at their top by a flanged strap 4 and also at an intermediate part near the top by an inner flanged strap 5. Both of these cross-straps are provided with guide-holes, through which extends a central vertical adjusting-bar 6,the vertical movements of which are limited by end pins 7 7. To force this bar upwardly in order to jam the machine in place, I provide a hand-lever 8, pivoted to frame supports or brackets at 9 and havinga link 10, which pivotally connects it with a tilting clutch-ring 11. The ring or plate 11 normally rests on cross-piece 5, and when the hand-lever is forced down into the position shown in dotted lines in Fig. 3 it will be tilted and jam upon the adjusting-bar, so that as the hand-lever moves down this bar will be forced upwardly. To look the bar in its successive positions as the hand-lever is raised, I provide a clutch-ring 12, which normally rests in inclined position, resting at one side upon a pin 13, secured to the cross-bar 4:. As the bar is lifted the clutch-ring 12 has assumed a horizontal position, and the bar slides upwardly through it. As the bar tends to drop thering assumes an inclined position and clamps it in place. Thus by rocking the hand-lever the adjusting-bar is automatically raised and locked in place.

The internally-screw-threaded box for the drill-shaft 14 is made in two parts 15 and 16, which are hinged together at one side. The lower part 16 is provided with laterally-projecting trunnions 17, which rest removahly in the hooked or recessed brackets 18. Each of these brackets is forked toembrace one of the side pieces of the frame, as shown in Fig. 4, and both are adjustably clamped to the frame by a rod extending through their rearwardly-projecting ends and having at one end a lug19, while theother end is screw-threaded and engaged by a hand clamping-nut 20. A spacing-sleeve 21 surrounds the bolt or rod between the side members of the frame to secure the parts in proper place. These supports are thus adjustably held and may be raised or lowered by unclamping the hand-n ut. The upper and lower halves of the internallythreaded box are clamped in closed position by means of a swing-bolt 22, pivoted to the' lower half and arranged to swing between projecting lugs 23 upon the upper half, a thumb -nut being provided upon the bolt. The lower half of the screw-threaded box seats in a recess in a block 24 and is centered in the block by a downwardlyprojecting boss, which engages the corresponding inner recess in the block and is secured by a tapbolt 25, extending through Washer 26 and into the boss of the block. A bent arm 27is preferably cast integral with the block 24 and carries a bearing 28 for a stub-shaft having a squared wrench portion at its outer end and a bevel-Wheel secured at its inner end. The bevel-wheel 29 engages a bevelwheel 30, having a hub with a feather which enters the groove or spline 31, extending longitudinally of the shaft.

In the operation of the device the hook supports are clamped at the desired height upon the post, the upper part of the box is swung open, and the drill-shaft inserted. The upper half of the box is then swung down and clamped, and the operator turns the drill-shaft by applying the wrench-ham dle (shown in Fig. 1) to either the end of the stub-shaft carrying wheel 29 or directly to the squared rear end of the screw-shaft. In making fresh drill-holes the drill-shaft may be swung to different angles on the boxtrunnions.

The advantages of my invention result from the simple and effective mechanism for raising and locking the adjusting-bar, from the box made in a plurality of parts, so that the drill-shaft may be taken out and the gears easily disconnected, and from the ability to adjust the drill-shaft to different angles and clamp it at different heights.

The device may be cheaply made and is found to be extremely effective in operation.

I claim 1-. In a coal-drilling machine, a hollow drillframe having a lower prong and an upper cross-bar with a hole therein, a verticallysliding securing-bar movable through the hole in the cross-bar, a clutch device arranged to move the bar upwardly, and an independent clutch device arranged to retain the bar in adjusted position; substantially as de-'.

scribed.

2. In coal-drilling machines, a hollow frame having a lower prong, a plurality of crossbars connecting the side members of the frame, a vertical adjusting bar movable through holes in the cross-bars, a lever-clutch device arranged to act upon the bar between the cross-bars, and an independent automatic clutch above the upper crossbar and arranged to hold the adjusting-bar in any adjusted position; substantially as described.

3. In a coaldrilling machine, a hollow frame having a lower prong with cross-pieces between the side members of the frame, a vertically-movable adj usting-bar arranged to slide in the frame, and having stop-pins near its ends, a lever having a ring-clutch to engage the bar, and an independent ring-clutch at the top of the frame arranged to lock the bar in adjusted position; substantially as described.

In testimony whereof I have hereunto set my hand.

Witnesses:

Lee. W. EWING, JOHN A. MOORE. 

